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    <title>Document</title>
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    <script>
        /* 编写函数map(arr) 把数组中的每一位数字都增加30%，并返回一个新数组 */
        var  arr_old=[10,100,1000];
        function map(){
            var arr_new=[];
            for(var i=0;i<arr_old.length;i++){
              arr_new.push(arr_old[i]*1.3);
            }
            return arr_new;
        }
        var result=map();
        console.log(result);
    </script>
</body>
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